Question about Chamberlain Powerdrive PD422D 1/2 HP Security Plus Screw Drive Garage Door Opener

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Garage door is opening by itself - Chamberlain Powerdrive PD422D 1/2 HP Security Plus Screw Drive Garage Door Opener

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If you have a unit that has dip switches simply change the code in the remote and on the motor head to a different set up. Both must match. If you have a rolling code(a unit with a learn button) you must erase the old codes out by holding down the colored learn button until the led light by it goes out. Then press and release the learn button and press the button on the remote. If this does not fix it find the two wires to the wall button on the motor head and unhook them. If that fixes it replace this wire and wall button. If not you will need a new logic board. Chamberlain.com is where you can get one. Thanks BB

Posted on Sep 16, 2010

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The motor is running for a second but is not moving the chain to open the garage door. it repeats itself a second time the stops itself completely.


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